The Franchi 48AL is an Italian made, recoil operated, autoloading shotgun. http://www.franchiusa.com/ http://www.franchi.com/
Contact the maker or US importer.
ABOUT $300-$350, depending on exact condition, box, papers, etc.
Try Blue Book of Gun Values
While researching this for my Dad I ran across another site where the value was listed as $100 dollars for one in fair to good condition. I don't agree, as it has more value to me. Some nice engraving on the receiver, and parts that keep working. It's worth what you think it is. They are worth more than that. Do some searches. No matter what condition they are not worth much, monetarily. Sometimes value includes much more than $$. They are reliable, dependable guns. The long recoil design is still in use today in the Franchi 48AL, and it worked fine for nearly 100 years in the Browning A-5 and the Remington model 11.